The following are known Action Replay Codes for Mr. Do! on Super Nintendo (SNES).

These codes are for the U.S. version of the game.

• Infinite Lives
  7E18B209
• 2 Enemies on Screen at Most
  7E144000
• Level Modifier
  7E189E??
  7E18A0??
  7E18B4??
  Note: Level is always 1 less than the number entered.